Saw-jointer



. drawings, i'orming a part of 'thisspecificatiom UNITED STATES PATENT" HARLES RUF s BL C'K, -OF TOPEKA, KAlx sAsl `sAw'-JoIN"r E v -SPECIPICATION formiilg part of Letters Patent No. 381,207, da tea April 17, 18 88; 4 Application filed June 9.1887. Seria1No.2 40,898. (No model.)

[TO all whom it ncy concern/ Be it known that I, GHARLEs RUFUS BLAC of Topeka,'in the county of Shawnee and State I may be passed through-asl ot, I, made :in the of Kansas, haveinvented a new and Improved Saw-Jointer, of'which the following is a full, clear, and exact description.

My invention relates to a device adapted for jointing or leveling the teeth of saws prior to filing the teeth Sharp or to a point; and the invention has for its object to provide a simple, inexpensiVe, and efficient device of this character. y

The invention consists in certain novelfeatures ofcoustruction and combinations of parts oi the saW-jointer. all' as hereinafter described and claimed. f

Reference is to be had to'the accompanying in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side view of my improved sawjointer as applied to use in jointing a sawblade, Which is shown only in part. Fig. 2`is alongitudinal sectiontaken through the joint er-plateson the line w x, Fig; 1; and Fig. 3 is a transverse section taken on the line y y, Fig. 1.

The saw-j ointer consists of two opposite clamp and 'guide plates-,I AB, and a file, C, whichis held by and between the plates and operates on the saw-teeth to joint them, as presently described. The plates A B have a like general or marginal form, and at theirlongest parts are provided with opposite inclined faces, a b, re-

spectively, against which any two angular faces of the trangular file C may Pest, and whereby the other flat face of the file will be about at a right angle with a slot, D, which is formed portions of the plates A B, for a half-inch orv between the plates A B by recessing their op-j posing faces, and into which slot the saw-blade JE entersto allow the file C to act on the teeth e of the blade. plates A B ire provided with lugs' F G, re

spectively, which lie one at each face of the saw-blade and serve asguides to prevent slip`-` ping of the-device from the blade, although these lugs are not essential,.as the recess D, which eXtends for the full length of the body more beyond the acting face of the file, would alone guide thejointer when used with care; but the guide-lugs F G allow the device to be used more confidentl'y by inexperienced per- Sons; One of the plates-the one, B, 'for in- At their central parts the preferablyyin the .form of 'a hook,H, which opposite 'p1ate, A, whereupon one or both plates will be moved en'dwise to cause the hook to lock over or outside 'of theouter faceof the plate A, and thereby'clamp'the platesA' B together and fastenthe file C securely between the plates. Directly underneath the bill of the hook H the plate B isslotted at h; to allow the plate to be readily cast in suitable metal without setting a core to form the hook, and

this slot h also forms a hole for entrance of the thumb ,or finger for more convenientl-y sliding the plates A B endwise to en'gage or disengage the hook H and'allow the plates to be separated or sharper face or sideof it to the Saw-teeth to bejointed.

The operation of the device is very simple and effective, as the jointer AB C" has but to be slipped onto the saw-blade'E, and by worko 7 whenthe'file is tobe turned to presenta new 4 teeth 6, which' may afterward be filed to 'a i point; thereby causing each tooth of the saw` to do its' full duty and promoting uick and easy cutting action of the saw, as will readily be u'nderstood. v i

I purpose making thefile C Straight an'des-. pecially for use in the j'ointer, thus' assuring the maximum'efficiency of the whole device.

Having thus described my inventiofn, what I claim as new; and desire to secure byLetters Patent isy 1. A saw'jointer comprising the two plates recessed on their inner adjacentfaces to form' saw and file receiving spaces, and provided respectively, with a slot and a'locing projection engaging the same, ,whereby the 'plates "may bereadily assembled or -disconnected,

substantially asset forth. e

2. A saw-jointer comprising two plates, A

B, formed With opposite inclined faces, a 'b,'

andrecessed to provide aslot, D, between'them [CO ,l

to .receive asaw-blade, and also to 'receive a triangular file, 'and one. plate having a' book,

H, and the other plate formed with a slot, `I

admitting'the hook for locking the plates together, substantially as shown' and described. i OHABLIES RUFUS BLAOK. 'Witnesses: r e

JNo. G. TULLOCH, E. RINEHARr. r 

